Sewing machine



Oct. 10, 1944. s u 2,360,284

SEWING MACHINE Filed July 2, 1940 "B Sheets-Sheet 2 1M ill H6 2 5&5

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{Ewe g, BY WW A TTORNEYS.

Oct. 10, 1944. G. SAUER 2,360,234

SEWING MACHINE Filed July 2, 1940 6 Sheets-Sheet 3 Z/MJW Georye ,Sauer,

. ATTORNEYS.

Oct. 10, 1944. s uE 2,360,284

SEWING MACHINE Filed July 2, 1940 s Sheets-Sheet 5 I 40a m y 114a i 107a105a 1151A 116a R {6a 5 l 3);, {J Zia jfld 121a -170 117a Ea L jflfia lx 4 22 a i ll I I: .f--.. 135d zaa 5 I F i1 42a WITNESSES: l N V EN TOR:

ATTORNEYS.

Oct, 10, 1944,

G. SAUER 2,360 284 SEWING MACHINE Filed July 2, 1940 6 Sheets-Sheet 6 ATTORNE YS.

Patented- Oct. 10, 1944 SEWING MACHINE George Sauer, Berwyn, Ill.,assignor to Union Special Machine Company, Chicago, 111., a corporationof Illinois Application July 2, 1940, Serial No. 343,513

12 Claims.

This invention relates to sewing machines; and it has reference moreparticularly to flat bed chain stitch sewing machines useful forexample, in closing the mouths of successively fed filled bags either bystitching alone or by stitching with concurrent application ofreinforcing elements along the line of the seam.

Machines of the kind referred to are ordinarily provided with feedingmechanisms whereof the rocker for directly imparting to and fro orfeeding movements to the feed bar is disposed rearward of the point ofstitch formation, and actuated by means inward of and along the feed barfrom a longitudinally extending rotary or feed shaft below the worksupport. Such machines are moreover ordinarily provided with severingmechanism by which free connecting portions of the stitch chain or thestitch chain and the tape are out between the successive articles. Inmachines thus organized, it was necessary to place the chain cutting orthe chain and tape cutting instrumentalities either to the rear of thefeed bar remote from the region of stitch formation, or to crowd theminto small, obstructed and inadequate intervening spaces where access tothem for the purposes of inspection, adjustment or replacement wasdiflicult and tim consuming.

The chief aim of my invention is to overcome the above drawbacks, whichobjective I realize in practice as hereinafter more fully disclosed, bydisposing the feed rocker forward of the point of stitch formation sothat ample space is afforded immediately to the rear of the feed dog forplacement of at least one of the cutting instrumentalities where thelatter are more readily accessible; and by disposing the elements foractuating the feed rocker at the opposite end of the feed shaft wherethey too are more readily accessible for inspection and adjustment.

Another aim of my invention is to attain greater compactness in feedingmechanism having the above attributes which desideratum I also realizeas hereinafter more fully disclosed by placing the feed bar in the planeof the needle 1' n a position where the looper may operate above it orto the needle side of itdepending upon whether the machine is used inhorizontal posit on or in vertical position, drive end up as is usual inbag closingand providing it with an aperture for passage of the needlethrough it.

Another aim of my invention is to attain the foregoing advantages in asewing machine Wherein the frame has a hollow base (as considered withthe machine in horizontal position) which contains the feeding mechanismand parts of the severing mechanism; a hollow needle arm supportingstandard which is oil tight and contains drive mechanism whereby thelower or feed shaft is connected to an upper or needle drive shaft, andan isolated chamber beyond the standard in which the elements connectedto said lower or feed shaft for actuating the feed rocker are housed.

Other objects and attendant advantages will appear from the followingdetailed description of the attached drawings wherein Fig. l is a viewin vertical longitudinal section of a sewing machine convenientlyembodying my invention with the machine shown in horizontal position.

Fig. 2 shows the left hand end elevation of the machin with the frontcover plate of the needle head removed to expose the parts at theinterior.

Fig. 3 is a horizontal section of'the machine taken as indicated by theangled arrows III-III in Fig. 1.

Fig. 4 is a fragmentary view partly in elevation and partly in sectiontaken as indicated by the angled arrows IV-IV in Fig. 3.

Fig. 5 is a view corresponding to Fig. 4 showing, in open position, thesevering means by which the thread chains between successive bags arecut.

Fig. 6 is a diagrammatic view in plan further showing the action of thestitch chain severing means.

Figs. 7 and 8 are detail views looking as indicated respectively by theangled arrows VIIVII and VIII-VIII in Fig. 3.

Figs. 9, 10 and 11 are views corresponding to Figs, 1-3 showing anotherembodiment of my invention.

Fig. 12 is a fragmentary view in plan looking down upon the machine bedas indicated by the angled arrows XII-XiIin Fig. 9; and

Fig. 13 is a cross sectional view of the machine through the machinebase taken as indicated by the arrows XIII-EH11 in Figs. 9, 11 and 12.

In the description which follows and in the claims, the relation of theparts is defined with respect to the horizontal position of the machine,which position has been chosen merely for convenience of illustration,although, as has been pointed out hereinbefore, the machine may be usedin vertical position with its drive end uppermost.

The machine illustrated in Figs. 1-8, to which particular reference willbe had for the time being, is designed for closing the mouths of bagssolely by means of a stitch chain, and to sever the connecting portionsof the chain between successive bags. As shown, the frame of the machineis formed as an integral structure with a hollow bed or base l5 whereofthe-top and bottom. rear and front walls are respectively designated bythe numerals l6, l1, l8 and I9, said base being open at the left handend, see Figs. 1, 2 and 3. Rising from the base l5 at the right handend, is a hollow standard from which extends horizontally at the top, ahollow arm 2| with a hollow head 22 at its free end, said head having aremovable end cover 23. From Fig. 1 it will be noted that in accordancewith my invention, the outer wall 24 of the standard is continueddownwardly as at 25 to form the right hand end wall of the base l5, andthat the inner wall 26 of said standard is likewise extended downward asat 21 to form a partition crosswise of said base. Also as shown in Fi 1,the inner wall 28 of the standard 20 is continued upwardly to form apartition 28 crosswise of the hollow overhanging arm 2|, and thatanother crosswise partition 29 spaced from thepartition 28 isolates the1101-.

low 38 of the head 22 from the central chamber 3| within said arm.Extending lengthwise through the overhanging arm 2| near the bottomthereof is a rotary shaft 32 which is journalled in bearing sleeves 33and 35 set respectively into the partitions 28 and 29. The shaft 32 alsohas journal support in a bearing sleeve 36 set into a boss 31 formed onthe outer wall 24 of the standard 20 and extends to the exterior forconnection thereto of a combined hand and belt wheel 38 whereby themachine can be operated either manually or by power.

Confined to up and down movement in guide bushings 40 and 4| set intothe top and bottom of the head 22 is a bar 42, which carries a needle 43at its lower end and which is reciprocated endwise, through a pitman 45,from a balanced crank member 46 secured to the left hand end of theshaft 32 within the hollow of the head. From Fig. 2 it is to beespecially noted that the bushing 40 is of such length that the upperend of the needle bar 42 is completely sheathed when elevated to thefullest extent. This provision serves as a safeguard against injury tothe operator When the machine is used in vertical position.

Cooperative with the needle in stitch formation within the base, is alooper 41, see Figs. 2 and 3. As shown, the looper 41 is secured to theupstanding arm 48 of a looper carrier 49 which is mounted foroscillatory movement about a laterallyextending pin or stud 50 on acollar 5| secured to a horizontal rock shaft 52 at the left hand end.The rock shaft 52 is journalled in spaced bearings 53 and 55 upstandingfrom the bottom H of the base l5, and affixed to it in the intervalbetween the bearings 53 and 55, is a laterally extending arm 56, which,through a strap rod 51, is connected with an eccentric 58 on a rotaryshaft 59 extending horizontally through the base of the machine. By themeans just described, the looper 41 is given its needle avoidingmovements. Through a train of intermeshing spur gears 68, 6| and 62within the standards 28, the shaft 59 is driven in unison and in thesame direction as the upper shaft 32. As shown in Figs. 1 and 3, thelower rotary shaft 59 is journalled in set bearings 65 and 66respectively in the partitions 25 and 21 and also has journal support inbearing bosses 61 and 68 upstanding from the bottom I1 of the base. Looptaking movements are imparted to the looper 41 through means whichincludes a horizontal link 69 connected at one end to the upstanding arm48 of the looper carrier 49 and at the other end to an upstanding arm 10whereof the fulcrum hub is rotatively free on a crosswise shaft 1| whichis fixedly held at its opposite ends in spaced lugs 12 and 13 upstandingfrom the bottom l1 of the base I5. Affixed to the rock shaft 1|intermediate the bosses 12 and 13 is a horizontal crank arm 15, which,through a short vertical pitman 16, is connected to a crank 11 on therotary shaft 59.

The improved feeding mechanism of the machine includes afeed dog 18whereof the toothed portions operate through slots in a removable throatplate 19 set into the top wall [6 of the base. As shown in Fig. 2, thefeed dog 18 has its shank secured with capacity for vertical adjustmentto the horizontal portion of a carrier bar 8| by means of a screw- 82.In accordance with my invention, the feed bar 8| is fashioned to angularconfiguration with its horizontal portion in the plane of the needle 43in the line of feeding, which is apertured as at 83 for passage of theneedle 43 through it, and a vertical portion which extends downwardly ofthe rear end of said horizontal portion. At its bottom end, the pendantportion 84 of the feed bar 8| is pivotally connected to the lower end ofa link 85 whereof the upper end is engaged with a crank 86 at the lefthand or distal end of the' lower rotary or feed shaft 59. Through thismeans, up and down or lift movements are imparted to the feed dog 18. Itis to be particularly noted from Fig. 2 that the toothed portion of thefeed dog 18 extends rearwardly of the direction of feeding andoverreaches considerable of the horizontal portion of the feed bar 8|,and that the looper 41 operates above the feed bar in the intervalbetween the latter and the overreaching portion of the feed dog. At itsfront end, the horizontal portion of the feed bar 8| is pivotallyconnected to an upstanding arm 81 on the distal end of a tubular rockshaft 88 which extends lengthwise through the base |5 in parallelrelation to the rotary shaft 59 forwardly of the latter as consideredwith regard to the direction of feeding. At its left hand end the rockshaft 88 is journalled in bearing lugs 89 and 90 projecting inwardlyfrom the front wall l9 of the base, and at its right hand end inbearings 9| and 92 set into the partitions 25 and 21. Due to theconstruction and arrangement of the feeding mechanism insofar as it hasbeen disclosed, a clear space is left to the rear of the verticalportion of the feed bar 8| for the accommodation of a stitch chainsevering mechanism which will presently be described. As shown in Figs.1 and 3, the right hand ends of the shafts 59 and 88 extend beyond thebearings 65 and 9| into a lateral recess 93 formed in the outer wall 25of the standard 20, said recess being closed by a removable cover plate94. Secured to the rock shaft 88 within the recess 93 is a rearwardlyextending horizontal arm 95, which, through a..Short vertical pitman 96is connected to an adjustable crank pin 91 on the right hand end of therotary shaft 59. The parts just referred to constitute the means wherebyhorizontal to and fro or feed movements are induced in the feed dog 18,said parts being readily accessible upon removal of the cover 94, forthe purposes of regulation to vary the feed stroke of said dog.

Incident to performing its feed strokes, thefeed dog 18 is opposed by apresser foot I98 whereof the front end is inclined upwardly and curvedas at |0| to facilitate entry of the leading edges of the bag mouthsbeneath it. As

shown, the presser foot I is pivotally connected at I02 to a shankmember I'03 at the lower end of the vertical presser bar I05 extendingupwardly through a guide bushing I00 at the bottom of the needle head 22into the interior of said head. The presser bar I05 is subject to theaction of a leaf spring I01 enclosed within the overhanging arm 2|. isapertured at its right hand end to engage the reduced top end of a pylonI08 upstanding from a transverse web I09 within the arm 2I intermediatethe partitions 28 and 23, and its outer end is bifurcated to fit over astirrup-like member II0 resting over the top of the presser bar I05. Thepressure of the spring I01 is regulatable by means of a screw III whichis' threaded into a boss H2 at the bottom of the overhanging arm 2I. Thepresser foot I00 is controllable by means including a rock shaft '3which ex-,;;=

tends lengthwise of the overhanging arm 2I and which is journalled inthe partitions 28 and 28. Ailixed to the end of the rock shaft II3within the needle head 22 is a horizontal finger II5 which underreachesa collar II5 secured to the presser bar I05 near the upper end.Extending outward through a slot I I1 in the rear side wall of theoverhanging arm 2I is a lever II8, which, at its inner end, is clampedto the rock shaft II3 within the chamber 3| by means of a screw H9. Atorsion spring shown at I in Fig. 2 with one end thereof engaging thefinger II5 from above tends to keep the lever II8 normally in thehorizontal position shown with 'its upper edge bearing against thecorresponding edge of the slot II1. Thus, as the lever H8 is depressed,the finger II5 will engage the collar H5 and thereby cause the presserfoot I00 to be elevated for convenience of initially inserting the worktherebeneath. By means of a link rod Hi, the lever I'IB may be connectedeither to an actuating knee press or foot treadle (neither illustrated)as desired. From Fig. 1, it will be noted that the hub I22 of the leverH8 is extended axially and has a wing I23, which, when said lever isoperated, tends to push the stem I24 of a spring thread tensioningdevice I25 for the needle thread within the chamber 3| of theoverhanging arm 2|, thereby to relieve said thread concurrently with thelifting of the presser foot.

The parts within the overheating arm 21 are rendered accessible uponretraction of the cover I26 at the top of the chamber 3|.

As previously stated, the machine is designed for stitching articlessuch as filled bags B whereof the open mouths are advanced in successionacross the work support I6. as shown in Fig. 6, by the feed dog 18, andchain-stitched by the needle 43 and its cooperating looper 41. For thepurpose of severing the portions of the stitch chain 0 betweensucceeding bags B (Fig. 6) I have provided an improved shearingmechanism, which, see Figs. 3-6, comprises a pair of blades I21, I 28arranged crosswise of the direction of feeding immediately to the rearof the vertical pendant portion of the feed bar 8I. The blade I21 isadjustably secured to the rear wall I8 of the machine base, at the lefthand thereof by a screw I29; While the blade I28 is similarly secured bymeans of a screw I30 within the slotted top of the vertical arm I3I ofan angular lever I32. The horizontal arm I33 of the lever I32 is fast ona rock shaft I34 whereof the ends are journalled respectively in the endwall I8 and a bearing lug I35 upstanding from the bottom I1 of the baseI5 within the hollow of the lat- As shown, the spring I01 I34 bearsagainst the hub of the lever I32, see' Fig. 2, to yieldingly maintainthe moving blade I28 at all times in shearing relation with the fixedblade I21. As shown in Fig. 5, the blade I28 has an extension I31 beyondits cutting edge I38, and against which the cutting edge 1'39 of theblade I21 bears for maintenance in alignment with the cutting edge I39of the stationary blade. Directly over the region of meeting of thecutting blades I21, I28, the work supporting plate 19 has a slot Win theline of feeding into which the connecting thread chain C, betweensuccessive bags, is drawn incident to manipulation of the bags in themachine, and is interrupted by the extension I31 of the moving blade I28and between the cutting edge of the latter and that of the fixed bladeI21, so that the chain is severed upon the next actuation of the cuttingmechanism. In the region of the cutting mechanism, the top of the rearwall I8 of the base I5 is thickened somewhat as at I4I (Figs. 2 and 3)and is provided with a slot I42 which registers with the slot I40 in thework support and which is sloped as at I42a (Fig. 2) to act after themanner of a chute to discharge the cut portions of the thread chain 'Cfrom the machine. As shown in Figs. 3 and 6, the slots I40 and I42 areboth rounded to facilitate entry of the thread chain. The movable knifeblade I28 is actuated from an eccentric I43 on the rotary shaft withinthe hollow of the base I5 in the interval between the looper rockereccentric 58 and the bearing lug 61, through a pendant strap link I44whereof the lower end is connected to a ball stud I45 at the corner orangle of the lever I'32 which carries .said movable blade.

By reason of the compact arrangement of the mote disposal of the feedmovement inducing elements at the driving end of the machine, amplespace is afforded at the left hand end of the machine base at the rearfor accommodation of the cutting elements of the chain severingmechanism. Moreover, since the left hand end of the base is open, asshown in Figs. 1-3, both the feed dog and the cutting elements arereadily accessible for inspection, adjustment or replacement. Inpractice a removable cover (not shown) is preferably provided for theopen left hand end of the machine base.

' The aforedescribed construction of the machine frame and feedingmechanism lends also itself to the incorporation of trimming mechanismand tape applying and severing mechanism of the kind featured in acopending patent application Serial No. 251,298 filed by me on January17, 1939. In Figs. 9-13, I have shown a sewing machine so organized,which, except as hereinafter particularly pointed out, is like thatshown in Figs. 1-8, and accordingly in order to obviate repetitivedescription, the corresponding parts in the latter illustrations areidentified with the same reference numerals previously employed, exceptfor the addition in each instance of the letter a for convenience ofmore ready distinction.

As shown in Fig. 10, the presser foot IOIla is longitudinally slotted atthe bottom as at I50 to serve as a guide for a reinforcing strip or tapeT which is to be applied crosswise of the mouths of the bags at oneside, the tape being first led through a vertical supplemental guide I5Isupportedat the front side of the needle head 22a enroute from a sourceof supply, not

illustrated. A second reinforcing strip or tape T for application to theopposite sides of the bag mouths is guided through a slot I52 formed inthe throat plate 19a, as shogvn in Figs. 10 and 12, after havingtraversed another supplemental guide I53 secured to the base I50. of themachine at the front side I9a thereof. Afiixed to the feed bar 8Ia ofwhich the horizontal portion is extended rearward as at I55 in thedirection of feeding, is a supplemental feed dog I 56; and cooperatingwith this supplemental dog to assist in holding the bag material and thestrips T, T to the work support during the stitching, is a supplementalpresser foot I 51. As shown, .the supplemental presser foot I51 ispivotally connected to the outer end of a horizontal arm I58 (Fig. 12)fulcrumed on a stud I59 which projects laterally from theforwardly-reaching arm I60 of a fixed bracket I6I bolted to the top ofthe machine base Ia. A finger spring shown at I62 in Fig. 12 pressesupon the arm I58 and thus serves to urge the supplemental presser footI51 toward the machine base over the region of the supplemental feed dogI56. By the mechanisms thus far described, the two reinforcing tapes T,T are concurrently applied crosswise of opposite faces of the collapsedmouths of the bags successively advanced beneath the presser feet I00a,I51 by the action of the feed dogs 18a, I56, and said bag mouths closedby a line of chain stitches formed centrally of the tapes T, T.

The machine also involves means for trimming off the excess material atthe bag mouths, which means includes a vertically reciprocating cuttingblade I63 with an inclined saw edge opposed to the direction of feeding,said blade passing down through a clearance slot (not shown) in thepressed foot I00a to one side of the plane of the presser bar I05a andalso through a'registe'ring slot I65 in the throat plate 19a, see Fig.12, to shear against one side of the latter slot. The trimming is thuseffected along a line which coincides with the outer edges of the tworeinforcing strips T, T. As shown in Figs. 9 and 10, the movable knifeblade I63 is secured to a head I66 at the lower end of a vertical sliderod I61 which is confined to up and down movement in a guide bracket I68at the bottom of the needle head 22a. The slide rod I61 is actuated,

through a pitman I69, from an eccentric I10 affixed to the needleactuating shaft 32a of the machine immediately adjacent thecounterbalanced crank member 46a, said pitman extending through'a'clearance opening I1I in the sloping bottom portion of'the needlehead. I

The incorporated mechanism for severing the stitch chain and the stripsT, T' beyond opposite side edges of the bags, includes a stationaryblade I12 whereof the cutting edge extends crosswise of the intervalbetween the main and auxiliary feed dogs 18a, I56and the correspondingmain and supplemental presser feet I00a, I51, and is exposed within atransverse slot I13 in the throat plate 19a. As shown in F185. 10,11 and12, the stationary blade I12 has a laterally tumed pendant attaching orshank portion I15, which, by

means of a cap screw I16, is secured to a bracket I11 reaching inwardlyfrom the rear side wall of the machine base I5a. With the stationaryblade I12 cooperates a movable blade I18 at'the outer end of an arm I19fulcrumed on a shaft I which is fixedly supported at opposite ends ipaced bosses I8I, I82 of the bracket I6I hereinbefore referred to, seeFig. 12. The movable blade I18 is normally held in elevated retractedposition by the action of a coiled tension spring shown at I88 in Fig.12 which tends to draw the arm upwardly. Free on the shaft I80 within abifurcation at the fulcrum end oi. the knife arm I19, is a rocker I85which is constantly oscillated as a consequence of the connection of anarm I86 thereon by a link I81 with an eccentric I88 on the shaft 59a,said link passingdownwardly through a clearance opening in the top I6aof the machine base I5a. Arranged to coact with the rocker I85 is acoupling member in the form of a latch dog I90 which straddles the knifearm I19, said dog having pendant cars which extend downward of oppositesides of said arm and freely engage the opposite ends of a pivot pin I9I passing through the arm, see Figs. 9 and 12. A compression. springI92 exerts upward pressure upon the latch dog I90 to hold the latterelevated with its pawl end I 93 normally retracted out of the path of anotched projection I95 on the constantly oscillating rocker I85.Opposing the action of the spring I92 is a lighter spring I96 incompression between a tail projection I91 of the latch dog I90 and acorresponding projection I98 on a trigger element I99, which is freelyfulcrumed on the pin I9I, at one side of the knife arm I19 in contiguousrelation with the corresponding ear of the latch dog I90. As shown inFig. 9, the trigger element I99 has a horizontal projection 200 oppositethe projection I98 which abuts a vertical stop screw 20I adjustable inthe dog I90. The trigger element I99 also has a depending feeler finger202, which,

. by the action of the spring I96 upon said elei the rear end of ,adetector arm 209, the latter being fulcrumed on the stud I59 on the armI80 of the bracket I6I, in the interval between the arm I58 of theauxiliary presser foot I51 andsaid bracket arm. Adjustably secured tothe free end of the detector arm 209 is a detector 2I0 which has theform of a shoe and which is undertraveled by the collapsed mouths of thebags successively passed through the machine. The bottom edge of thedetector 2I0 is yieldingly depressed normally into a slot 2 in thethroat plate 19a by a coiled finger spring 2I2 which underreaches thedetector arm 209 rearwardly of its fulcrum.

The operation of the severin mechanism embodied in the machine of Figs.9-13 is fully described in the copending application to which referenceis made hereinbefore, and it is therefore deemed unnecessary to repeatit here, since, per se, it does not constitute any part of the presentinvention. In the present connection, however, it is important toobserve that by reason of the novel construction and arrangement of thefeed mechanism, ample room is afforded in the left hand end of themachine base for the A accommodation of the lower knife I15 of the tapecutting mechanism as well as for the bracket I 11 by which said knife issupported, and that the securing screw I16 is readily accessible whenremoval of said knife becomes necessary for resharpening or replacement.

Attention is also directed to the fact that in both the machines whichhave been exemplified, the construction and arrangement'of the feedingmechanism actually makes it possible to reduce the width of the machinebase (see Figs. 3 and 11) at the left hand end notwithstanding theprovision of more ample room for the accommodation of the cuttingelement of the chain and tape severing mechanisms rearward of the feeddog in the line of feeding. Another feature of great practicalimportance is that the machine frame lends itself to either of the twoexemplified forms of severing mechanisms without entailing any changeseither in the feeding mechanism, the needle actuating mechanism, or thepresser foot and tension control. While either machine may be used inthe horizontal position in which position it is herein shown forconvenience of illustration; it is more often suspended in verticalposition from its standard end (e. g. right hand end in Fig. 1) whenemployed for closing the mouths of filled bags.

Having thus described my invention, I claim:

1. In a sewing machine, a work support; a

reciprocating needle movable through the work support; a. feed bar ofright angle configuration in the plane of the needle with a portionaligned in the 'direction of feeding and extending forwardly of theneedle, and a perpendicular terminal portion immediately rearward of theneedle in the direction of feeding; a rocker-connected to the front endof the feed bar for imparting longitudinal feed movements to the bar;means con-. nected to the perpendicular portion of the bar for impartinglift movements to the bar; and means cooperative with the needle institch formation including a looper which moves in an orbit at theneedle or work support side of the feed bar,

and a carrier arm for the looper movable laterally of the feed bar atthe side thereof remote from the work support,

2. In a sewing machine, a work support; a reciprocating needle movablethrough the work support; a feed bar in the plane of the needle with aportion aligned in the direction of feeding and extending forwardly ofthe needle, and a perpendicular terminal portion at its rear endimmediately rearward of the needle in the direction of feeding; a rotaryshaft at right angles to the feed bar with its axis substantially in theplane of the perpendicular portion of the bar; a rock shaft forward ofand parallel to the rotary shaft and oscillated therefrom; a rocker onthe rock shaft connected to the front end of the feed bar to impartlongitudinal feeding movements to the bar; a rotary actuator on therotary shaft; a link connecting the rotary actuator with theperpendicular portion of the feed bar to impart lift movements to saidbar; and means cooperative with the needle in stitch formation includinga looper which moves in an orbit at the needle or work support side ofthe feed bar, and a carrier arm for the looper movable laterally of thefeed bar at the side thereof remote from the work support.

3. In a sewing machine, a Work support; a reciprocating needle operatedfrom one side of the work support; a rotary shaft extending lengthwiseof the other side of the work support; means adjacent one end of theshaft for driving it; a feed bar aligned in the direction of feeding inthe plane of the needle and extending forwardly of the needle; a rockshaft parallel to the rotary shaft at the same side of the work support;an actuating connection between the drive end of the rotary shaft andthe corresponding end of the rock shaft for oscillating the latter; arocker at the opposite end of the rock shaft connected to the feed barto communicate longitudinal feed movements thereto; and meanscooperative with the needle in stitch formation including a looper whichmoves in an orbit at the needle or work support side of the feed bar,and a carrier arm for the looper movable laterally of the feed bar atthe side thereof remote from the work support.

4. In a sewing machine, a frame with a hollow base affording a worksupport, and a standard extending perpendicularly therefrom at one endand supporting a parallel needle arm; a needle guided for reciprocationat the front end of said arm; a needle-actuating shaft extendinglengthwise of the needle arm; a shaft extending lengthwise of the baserearwardly of the needle with respect to the direction of feeding;gearing within the standard connecting the two shafts at one end; a rockshaft within the base parallel to and substantially coextensive with thesecond shaft; connections by which the rock shaft is oscillated from thedrive end of the said second shaft; a feed dog; a supporting bartherefor aligned in the direction of feeding in the plane of the needleand extending forwardly of the needle; arocker at the opposite end ofthe rock shaft connected to the front end of the feed bar forwardly ofthe needle for imparting longitudinal feed movements to the feed dog;and means cooperative with the needle in stitch formation including alooper which moves in an orbit at the needle or work support side of thefeed bar, and a carrier arm for the looper movable laterally of the feedbar at the side thereof remote from the work support.

5. In a sewing machine, a frame with a hollow base, a hollow standardextending perpendicularly therefrom at one end and supporting a parallelneedle arm, partitions crosswise of the base in continuation of theopposite walls of the standard, and an isolated chamber beyond the outerpartition; a reciprocating needle at the free end of the arm; aneedle-actuating shaft extending lengthwise of the needle arm; ahorizontal shaft extending lengthwise within the base, the latter shaftextending through the partitions with its rear end terminating in thechamber aforesaid; gearing within the standard connecting the twoshafts; a rock shaft within the base parallel to and substantiallyco-extensive with the lower shaft, said rock shaft being forward of theneedle with respect to the direction of feeding; connections within thechamber aforesaid by which the rock shaft is oscillated from the lowershaft; a rocker on the rock shaft at its distal end; a feed dog; a feeddog carrier bar in the plane of the needle connected to the rocker forimparting longitudinal feed movements to the feed dog, said bar beingaligned in the direction of feedmg; a looper to cooperate with theneedle and movable transversely of one side of the feed bar; and acarrier for the looper movable transversely of the opposite side of thefeed bar.

A Sewing machine according to claim 5, in Winch the isolated chamber isprovided with a ifitractailalehcover so that access may be had to e rocs aft oscillatin me d c amber. g ans housed withln 7. In a sewingmachine for chain-stitching articles successively passed through it, areciproeating needle; a feed bar extending forwardly of the needle withregard to the direction of feeding n lying in the plane of the needle,and

' plane parallel to and immediately rearward of the perpendicularterminal portion of the feed bar.

8. In a sewing machine, a reciprocating needle; a feed bar having aportion aligned in the direc tion of feeding and extending forwardly ofthe needle and with provision for clearance of the needle, and aperpendicular portion at its rear end; a rotary shaft at right angles tothe feed bar with its axis substantially in the plane of theperpendicular portion of the bar; a rock shaft extending parallel to therotary shaft and oscillated therefrom; a rocker on the rock shaftconnected to the front end of the feed bar to impart longitudinal feedmovements to said bar; a rotary actuator on the rotary shaft; a linkconnecting the rotary actuator with the end of the perpendicular portionof the feed bar to impart lift movements to the latter; a looper tocooperate with the needle in stitch formation; means for supplyingcontinuous reinforcing tape for attachment to articles by the stitching;and mechanism for severing the connecting chain and the tape between thesuccessive articles including cutting means operative in a planeparallel to and immediately rearward of the perpendicular portion of thefeed bar.

9. In a sewing machine for chain-stitching articles successively passedthrough it, a frame with a hollow base having a hollow standardextending perpendicular thereto at one end and supporting a needle armin parallel relation to the base; a needle-actuating shaft extendinglengthwise of the needle arm; a rotary shaft extending lengthwise withinthe base; gearing within the standard connecting the two shafts; a rockshaft within the base parallel to and substantially coextensive with therotary shaft; housed connecfor imparting longitudinal feed movements tothe feed dog; severing mechanism including cutting means within the baserearward of the feed bar;

and a rearwardly open slot in the base at the rear thereof through whichthe portions of the stitch chain connecting successive articles dropinto the province of the cutting means.

10. In a sewing machine for chain-stitching articles successively passedthrough it, a frame with a hollow base; a rotary shaft extendinglengthwise through the base; means at one end of the shaft for drivingit; a reciprocating needle movable into the base; a feed bar having aportion aligned in the direction of feeding and extending forwardly ofthe needle with provision for clearance of said needle, and having aperpendicular portion at its rear end; a rocker connected to the frontend of the feed bar whereby longitudinal feed movements are imparted tosaid bar; a rotary actuator on the distal end of the shaft; a linkconnecting the rotary actuator to the end of the perpendicular portionof the feed bar and extending substantially parallel to said portion forimparting lift movements to the feed bar; a looper to cooperate with theneedle in stitch formation; and mechanism for severing connectingportions of the stitch chain between the succcessive articles includinga cutting element and a support therefor located in the base in aninterval between the rear wall of the latter and the perpendicular endportion of the feed bar.

11. In a sewing machine, a reciprocating needle; a feed bar extendingforwardly of the needle in the line of feed to actuating means therefor;a feed dog in the form of a cantilever carried by and overhanging thebar at the stitch point of the machine, with provision of a clearanceinterval between said dog and said bar; and a looper movable throughsaid interval to cooperate with the needle in stitch formation.

12. In a sewing machine, a reciprocating needle; a feed bar extendingforwardly of the needle sides thereof; and a looper movable through saidinterval to cooperate with the needle in stitch formation.

GEORGE SAUER.

